Went to my local Lowes to get some brushes for cleaning carbs on my lawn equip. Found these on clearance. As I recall they are normally a few dollars each. YMMV with these.
Stainless steel
https://www.lowes.com/pd/Blue-Haw…h/50021972
https://brickseek.com/lowes-inven…u=50021
Carbon Brush
https://www.lowes.com/pd/Blue-Haw…h/50021970
https://brickseek.com/lowes-inven…u=50021